/ Dictionary / Index G granddaddy: Meaning and Definition of Find definitions for: grand•dad•dy Pronunciation: (gran'dad"ē), [key] — pl. -dies. grandfather. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: granddaddy (Thesaurus) granddad granddaughter Related Content Daily Word Quiz: loquacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language